If pipelines don't get approved North America will see a massive increase in train transport for crude products.
Pipelines are the safest form of transport. If you establish regulations on emergency shutdown valve frequency and frequency of smart pigging you increase the safety of the lines. Unfortunately most proponents of pipelines are being bankrolled by places like Venezuela. If you oppose Alberta oil because it is dirty but accept foreign oil because the practice is cleaner you have bigger problems. Alberta oil is the most ethical oil in the world.
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